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离子交换

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The mechanism, thermodynamics and kinetics of ion-exchange reactions between alkali, alkaline-earth and transition metal ions and zirconium phosphate and its derivatives are reviewed, progress in ion-exchange reaction between luminescent metal complex and zirconium phosphate is also discussed.

本文综述了碱金属、碱土金属、过渡金属离子等与磷酸锆及其衍生物的离子交换反应机理、热力学和动力学特性,另外也讨论了发光金属配合物与磷酸锆的离子交换反应研究进展。

The results indicate that the self-made anion exchange fiber has struc...

结果表明:自制的离子交换纤维具有强碱性离子交换纤维的结构特征和一定的化学稳定性。

But in the process of ion exchange, xylose molecular is easily converted into arabinose because of catalytic isomerization, which results in the decrease of its purity and difficulty of crystal.

木糖是一种在化工、食品等领域有着广泛用途的五碳糖,工业生产是用稀强酸将玉米芯中含有的大量多缩戊糖分解为单个的木糖分子,然后通过离子交换除盐、脱色,精制提取,但在强碱离子交换柱中,木糖分子容易被部分催化异构转化为阿拉伯糖,使得木糖纯度下降,结晶困难。

Wastewater containing titanium pigment was treated by microfiltration membrane, Nanometer titanium can be purified and concentrated by use of microfiltration. Operational conditions were optimized and the model was built. Finally, the amount of wash water was reduced. Based on the above research, the whole set equipment was designed, which can meet the needs in a titanium industry with a capability of 500 ton per year. Backflush and automatic control were used in the equipment, which has been steadily run two years, has been widely adopted in titanium industry. The technology has been widely adopted in titanium industry.In the recent years, whole set equipment of ceramic membrane was increasingly used in the recovery of desired production from fermentation broth in China. A new membrane process integrated with pretreatment of flocculation or coagulation was exploited to recover Inosine. ZrO2 ceramic membrane was used in the work, and the average permeation flux could reach 150L/m2.h under pH value of 3, transmembrane pressure 0.1MPa, CFV 3m/s, and temperature higher than 70C. The recovery ratio of inosine is higher than traditional recovery method, although inosine degraded under acidic and high temperature condition.

实验表明,ZrO_2膜处理肌苷发酵液的合适条件为pH=3、操作压力为0.1MPa、膜面流速3m/s、温度大于70度,此时可以获得平均渗透通量150L/m~2h,但由于酸性条件、高温下肌苷降解,导致肌苷收率有所降低,但仍高于传统肌苷提取方法得到的收率;为进一步提高肌苷得率,缩短提取工序,实验研究了絮凝剂预处理发酵液,解决碱性条件下由于蛋白析出导致膜污染加重的问题,研究表明采用CaCl_2絮凝并调节pH=11,可以获得平均渗透通量为180L/m~2h,肌苷得率大于95%;比较了三种肌苷提取工艺得到的产品质量,采用预处理与陶瓷南京工业大学博士学位论文膜分离结合的除杂工艺得到的粗昔质量与陶瓷膜分离、离子交换及活性炭吸附工艺生产的粗普质量相当,均优于传统的提取工艺;设计了每小时处理12一巧吨肌普发酵液的陶瓷膜成套装置,采用部分内循环的方式降低设备的能耗,简化了肌昔提取方式,提高了产品的收率和得率,由于减少离子交换和活性炭吸附,使得工厂废水排放量降低30一40%,降低酸、碱用量,有利于环境保护。

With abroad congener technology photograph is compared, the compound function colophony of new research and development is measured to the adsorption of organic matter in liquid waste of printing and dyeing raise 1 times above, and fight contaminative ability to increase greatly.

与国外同类技术相比,新研发的复合功能树脂一般也称离子交换树脂(用化学法将高分子共聚物制成的有机单体颗粒的离子交换剂对印染废水中有机物的吸附(物质表面吸住周围介质中的分子或离子现象)量提高1倍以上,且抗污染能力大大增强。

Used for rev erse phase and ion pair chro matography; ion exchange resins used for ion exchange

被用于反相色谱和离子对色谱,离子交换树脂用于离子交换色谱而硅胶或微孔玻璃珠用于分子排

The results show that the quaternary ammonium cations C12 TA(superscript + and C14 TA(superscript +) with short alkyl chain only react with the hydration cation in the interlamerllar space of hydrobiotite, while those with long chain C16 TA(superscript + and C18 TA(superscript +) first react with the hydration cation, then with the kalium cation in phlogopite interlayer.

结果表明:较短链长的季铵盐阳离子C12TA(上标+, C14TA只与水黑云母蛭石晶层中的水合阳离子发生反应;而长链季铵盐阳离子C16TA(上标+, C18TA先同蛭石晶层的水合阳离子交换反应,再与云母晶层中的钾离子发生交换反应。

The synthetic of high performance chelating resin and the study of ion exchange equipment will be two research topics in the future.

提出利用离子交换法处理低浓度金属离子废水易于实现工业化和自动化,是将来的发展趋势,其中高性能树脂的合成以及离子交换设备研究是以后的两大研究方向。

The results showed that the kinetical rule of the ion-exchange reaction was not changed, the ion-exchange process was still controlled by the grain diffusion, and the concentration of Cl~- has little effect on the apparent activation energy of reaction if the total concentration of ion in the solution kept invariableness.

结果表明,在维持溶液中离子总的当量浓度不变的条件下,离子交换反应的动力学规律不会发生改变,反应仍然是受粒扩散控制,氯离子浓度对交换反应表观活化能的影响不大。

Ion chromatography using pellicular ion exchange resins and dilute solution can be devoted to the study of ion exchange thermodynamics and kinetics.

离子色谱法采用薄层离子交换树脂和稀溶液体系,可以作为研究离子交换热力学和动力学的理想手段。

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With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务,乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐,因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。

Closes the eye, the deep breathing, all no longer are the dreams as if......

关闭眼睛,深呼吸,一切不再是梦想,犹如。。。。。。